US4611755A - Automobile air conditioner system with improved temperature control device - Google Patents

Automobile air conditioner system with improved temperature control device Download PDF

Info

Publication number
US4611755A
US4611755A US06/798,027 US79802785A US4611755A US 4611755 A US4611755 A US 4611755A US 79802785 A US79802785 A US 79802785A US 4611755 A US4611755 A US 4611755A
Authority
US
United States
Prior art keywords
air
mix door
control device
conditioner system
air conditioner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/798,027
Inventor
Choshichi Miyanaga
Yoshihiko Sakurai
Katsumi Iida
Akihiro Hagiwara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Corp
Original Assignee
Diesel Kiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP59175269A external-priority patent/JPH0648322B2/en
Application filed by Diesel Kiki Co Ltd filed Critical Diesel Kiki Co Ltd
Assigned to DIESEL KIKI CO., LTD. reassignment DIESEL KIKI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAGIWARA, AKIHIRO, IIDA, KATSUMI, MIYANAGA, CHOSHICHI, SAKURAI, YOSHIHIKO
Application granted granted Critical
Publication of US4611755A publication Critical patent/US4611755A/en
Assigned to ZEZEL CORPORATION reassignment ZEZEL CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DIESEL KOKI CO., LTD.
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00835—Damper doors, e.g. position control
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/1393—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures characterised by the use of electric means

Definitions

  • the present invention relates generally to an automobile air conditioner system, and more particularly to such system having a temperature control device for adjusting the opening position of an air-mix door in the air conditioner system to control the temperature of air blown into a vehicle passenger compartment.
  • Japanese Utility Model Laid-open Publication No. 59-75797 discloses one such automobile air conditioner system which comprises, as shown in FIG. 4 of the accompanying drawings, an air-mix door 3 disposed in an air duct 1 immediately upstream of a heater core 2 to proportion the amount of air flow passing through the heater core 2 and the amount of air flow by-passing the heater core 2, thereby controlling the temperature of air which is introduced into a vehicle passenger compartment.
  • the air temperature t blown-off from the duct 1 is determined in accordance with the opening position or amount 0 of the air-mix door 3.
  • the air-mix door 3 is connected to a drive shaft 6 of a motor actuator 5 via a linkage mechanism 4.
  • the motor actuator 5 includes a motor 8 driven by a control circuit 7 to turn the drive shaft 6 in response to an output signal from the control circuit 7.
  • the motor actuator 5 further includes a potentiometer 9 for detecting the opening amount of the air-mix door 3.
  • the potentiometer 9 includes a movable contact 9a movable in unison with the air-mix door 3, and a resistance element 9b along which the movable contact 9a slides such that the output voltage at the movable contact 9a is a linear function of the displacement of the contact with various sensors such as a temperature setter 10, a compartment air temperature sensor 11, an outside air temperature sensor 12 and a sunlit-portion temperature sensor 13 to receive therefrom input information concerning thermal loads on the air conditionner system.
  • the control circuit On the basis of the input information, the control circuit then computes a composite signal corresponding to the thermal loads.
  • the composite signal is compared with the signal delivered from the potentiometer 9 and indicative of the opening amount of the air-mix door 3 so as to determine a control signal which is in turn fed back to the motor 8 to control the same.
  • the blown-off air temperature t of the temperature control system occasionally varies out of linear function of the opening amount ⁇ of the air-mix door 3. More specifically, as shown in FIG. 5, as the air-mix door 3 approaches its full hot position, the blown-off air temperature t shows an irregular change with respect to an even increase in the opening amount ⁇ of the air-mix door 3. Occurence of such phenomenon depends upon the structure of the duct 1 or the location of the heater core 2.
  • the control circuit 7 would produce output signals to move the air-mix door 3 toward the HOT side for effecting a uniform increase ⁇ 2 in the opening amount ⁇ , thereby increasing the blown-off air temperature t by the amount ⁇ t 2 .
  • the desired preset temperature is obtainable when the opening amount ⁇ of the air-mix door 3 is below a value ⁇ 1 .
  • a change or variation ⁇ t2' becomes greater than the change ⁇ t 2 and deviates from the present temperature. As a result, comfortable air conditioning of the vehicle passenger compatment is difficult to achieve.
  • an object of the present invention is to provide a temperature control device used in an automobile air conditioner system in which the temperature of air blown into a vehicle passenger compartment is properly adjusted at the desired value, thereby providing vehicle occupants with a pleasant feeding.
  • an automobile air conditioner system including an air-mix door for adjusting the temperature of air blown-off from the air conditioner system, and a temperature control device having a potentiometer including a movable contact movable in unison with said air-mix door and a resistance element along which said movable contact slides for detecting the opening amount of said air-mix door, said temperature control device comprising at least one tap disposed between opposite ends of said resistance element, and an auxiliary resistance connected at its one end with said tap and disposed parallel to said resistance element.
  • the auxiliary resistance is connected parallel to one portion of the fixed terminal or tap.
  • the output voltage of the potentiometer which is proportional to the opening amount ⁇ , shows a sharp change at the tap. This change in the output voltage corresponds to a change in the opening amount in the air-mix door.
  • FIG. 1 is diagrammatic view of an automobile air conditioner system having a temperature control device according to the present invention
  • FIG. 2 is a circuit diagram showing the connection of the potentiometer according to the present invention.
  • FIG. 2 is a circuit diagram showing the connection of the potentiometer according to the present invention.
  • FIG. 3 is a graph showing the output charateristic of the potentiometer
  • FIG. 4 is a diagramatic view of an automobile air conditioner system having a conventional temperature control device.
  • FIG. 5 is a graph showing the blown-off air temperature against the opening amount of an air-mix door.
  • An autmobile air conditioner system comprises an air duct 1 including a heater core 2 disposed therein and an air-mix door 3 disposed immediately upstream of the heater core 2 to adjust the air flow through the heater core 2, thereby the temperature t of air which is blown into a vehicle passenger compartment.
  • the system also includes a temperature control device 5 connected with the air-mix door 3 via a linkage mechanism 4.
  • the control device 5 comprises a motor actuator having an output shaft 6 coupled with the air-mix door 3 for movement in unison therewith.
  • the motor actuator 5 includes a motor 8 controlled by a control circuit 7 to turn the output shaft 6 in response to the output signal delivered from the control circuit 7.
  • the motor actuator 5 further has a potentiometer 9 for detecting the opening position or amount of the air-mix door 3.
  • the control circuit 7 is connected with a temperature setter 10, a compartment air temperature sensor 11, an outside air temperature sensor 12 and a sunlit-portion temperature sensor 13 for receiving respective output signals representing information concerning thermal loads on the air conditioner system.
  • the control circuit 7 computes, on the basis of the input information, a composite signal corresponding to the thermal loads, then determines a control signal by comparing the composite signal with a signal indicative of the opening amount of the air-mix door 3 which is delivered from the potentiometer 9, and finally feeds the control signal back to the motor 8 to control the latter.
  • the potentiometer 9 includes a movable contact 9a adapted to be moved in unison with the air-mix door 3, and a resistance element 9b along which the movable contact 9a slides such that the output voltage at the contact 9a is proportional to the displacement of the contact 9a.
  • the potentiometer 9 further includes a fixed terminal or tap 14 disposed between opposite ends of the resistance element 9b.
  • An auxiliary resistance 15 is connected at its other end to the anode of a power source 16.
  • the auxiliary resistance 15 is connected parallel to one of two portions of the resistance element 9b which are separated from one another by the tap 14.
  • the auxiliary resistance 15 is mounted externally of the motor actuator 5. Alternatively, it may be mounted on a circuit board disposed in the motor actuator 5.
  • the electric circuit diagram of the potentiometer 9 is shown in FIG. 2 wherein I 1 representates the current flowing across the auxiliary resistance 15, I 2 the current flowing between an upper end of the resistance element 9b and the tap 14, I 3 the current flowing between the tap 14 and a lower end of the resistance element 9b, r the resistance per unit length of the resistance element, L 0 the distance between the lower end of the resistance element 9b and the tap 14, x the distance between the lower end of the resistance element 9b and the movable contact 9a.
  • a sharp change in the blown-off air temperature occurring when the air-mix door 3 has the opening amount ⁇ 1 is compensated by the potentiometer 9 which in turn delivers an output signal to the control circuit 7.
  • Such compensation ensures that the blown-off air temperature t varies along the desired performance line indicated by the phantom lines in FIG. 5.
  • the blown-off air temperature t changes an even rate of variation over the entire range of movement of the air-mix door 3 so that a stable temperature change of blown-off air and improves feelings of occupants of the vehicle passenger compartment are provided.
  • auxiliary resistance 15 is connected to the tap 14 fixed to the resistance element 9b at the power source side of the latter, two such taps and auxiliary resistance may be employed in which instance the other end of each auxiliary resistance is grounded. Other modifications are possible to satisfy the desired performance of the potentiometer.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

A temperature control device used in an automobile air conditioner system includes a potentiometer for detecting the opening amount of an air-mix door. The potentiometer is tapped and includes at least one auxiliary resistance connected in parallel with a resistance element of the potentiometer.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to an automobile air conditioner system, and more particularly to such system having a temperature control device for adjusting the opening position of an air-mix door in the air conditioner system to control the temperature of air blown into a vehicle passenger compartment.
2. Prior Art
Japanese Utility Model Laid-open Publication No. 59-75797 discloses one such automobile air conditioner system which comprises, as shown in FIG. 4 of the accompanying drawings, an air-mix door 3 disposed in an air duct 1 immediately upstream of a heater core 2 to proportion the amount of air flow passing through the heater core 2 and the amount of air flow by-passing the heater core 2, thereby controlling the temperature of air which is introduced into a vehicle passenger compartment. Thus, the air temperature t blown-off from the duct 1 is determined in accordance with the opening position or amount 0 of the air-mix door 3. The air-mix door 3 is connected to a drive shaft 6 of a motor actuator 5 via a linkage mechanism 4. The motor actuator 5 includes a motor 8 driven by a control circuit 7 to turn the drive shaft 6 in response to an output signal from the control circuit 7. The motor actuator 5 further includes a potentiometer 9 for detecting the opening amount of the air-mix door 3. The potentiometer 9 includes a movable contact 9a movable in unison with the air-mix door 3, and a resistance element 9b along which the movable contact 9a slides such that the output voltage at the movable contact 9a is a linear function of the displacement of the contact with various sensors such as a temperature setter 10, a compartment air temperature sensor 11, an outside air temperature sensor 12 and a sunlit-portion temperature sensor 13 to receive therefrom input information concerning thermal loads on the air conditionner system. On the basis of the input information, the control circuit then computes a composite signal corresponding to the thermal loads. The composite signal is compared with the signal delivered from the potentiometer 9 and indicative of the opening amount of the air-mix door 3 so as to determine a control signal which is in turn fed back to the motor 8 to control the same.
The blown-off air temperature t of the temperature control system occasionally varies out of linear function of the opening amount θ of the air-mix door 3. More specifically, as shown in FIG. 5, as the air-mix door 3 approaches its full hot position, the blown-off air temperature t shows an irregular change with respect to an even increase in the opening amount θ of the air-mix door 3. Occurence of such phenomenon depends upon the structure of the duct 1 or the location of the heater core 2.
If the opening amount θ of the air-mix door 3 were linearly related to the output voltage of the potentiometer 9, the control circuit 7 would produce output signals to move the air-mix door 3 toward the HOT side for effecting a uniform increase Δθ2 in the opening amount θ, thereby increasing the blown-off air temperature t by the amount Δt2. With this arrangement, the desired preset temperature is obtainable when the opening amount θ of the air-mix door 3 is below a value θ1. However, when the opening amount θ exceeds the value θ1, a change or variation Δt2', becomes greater than the change Δt2 and deviates from the present temperature. As a result, confortable air conditioning of the vehicle passenger compatment is difficult to achieve.
SUMMARY OF THE INVENTION
With the foregoing difficulties associated with the prior apparatus in view, an object of the present invention is to provide a temperature control device used in an automobile air conditioner system in which the temperature of air blown into a vehicle passenger compartment is properly adjusted at the desired value, thereby providing vehicle occupants with a pleasant feeding.
According to the present invention, the foregoing and other objects are attained by an automobile air conditioner system including an air-mix door for adjusting the temperature of air blown-off from the air conditioner system, and a temperature control device having a potentiometer including a movable contact movable in unison with said air-mix door and a resistance element along which said movable contact slides for detecting the opening amount of said air-mix door, said temperature control device comprising at least one tap disposed between opposite ends of said resistance element, and an auxiliary resistance connected at its one end with said tap and disposed parallel to said resistance element.
As described above, the auxiliary resistance is connected parallel to one portion of the fixed terminal or tap. With this construction, the output voltage of the potentiometer, which is proportional to the opening amount θ, shows a sharp change at the tap. This change in the output voltage corresponds to a change in the opening amount in the air-mix door.
Many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is ahown by way of illustrative example.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is diagrammatic view of an automobile air conditioner system having a temperature control device according to the present invention;
FIG. 2 is a circuit diagram showing the connection of the potentiometer according to the present invention;
FIG. 2 is a circuit diagram showing the connection of the potentiometer according to the present invention;
FIG. 3 is a graph showing the output charateristic of the potentiometer;
FIG. 4 is a diagramatic view of an automobile air conditioner system having a conventional temperature control device; and
FIG. 5 is a graph showing the blown-off air temperature against the opening amount of an air-mix door.
DETAILED DESCRIPTION
The present invention is described in greater detail with respect to an embodiment shown in FIG. 1.
An autmobile air conditioner system comprises an air duct 1 including a heater core 2 disposed therein and an air-mix door 3 disposed immediately upstream of the heater core 2 to adjust the air flow through the heater core 2, thereby the temperature t of air which is blown into a vehicle passenger compartment. The system also includes a temperature control device 5 connected with the air-mix door 3 via a linkage mechanism 4. The control device 5 comprises a motor actuator having an output shaft 6 coupled with the air-mix door 3 for movement in unison therewith. The motor actuator 5 includes a motor 8 controlled by a control circuit 7 to turn the output shaft 6 in response to the output signal delivered from the control circuit 7. The motor actuator 5 further has a potentiometer 9 for detecting the opening position or amount of the air-mix door 3. The control circuit 7 is connected with a temperature setter 10, a compartment air temperature sensor 11, an outside air temperature sensor 12 and a sunlit-portion temperature sensor 13 for receiving respective output signals representing information concerning thermal loads on the air conditioner system. The control circuit 7 computes, on the basis of the input information, a composite signal corresponding to the thermal loads, then determines a control signal by comparing the composite signal with a signal indicative of the opening amount of the air-mix door 3 which is delivered from the potentiometer 9, and finally feeds the control signal back to the motor 8 to control the latter.
The potentiometer 9 includes a movable contact 9a adapted to be moved in unison with the air-mix door 3, and a resistance element 9b along which the movable contact 9a slides such that the output voltage at the contact 9a is proportional to the displacement of the contact 9a. The potentiometer 9 further includes a fixed terminal or tap 14 disposed between opposite ends of the resistance element 9b. An auxiliary resistance 15 is connected at its other end to the anode of a power source 16. Thus, the auxiliary resistance 15 is connected parallel to one of two portions of the resistance element 9b which are separated from one another by the tap 14. The auxiliary resistance 15 is mounted externally of the motor actuator 5. Alternatively, it may be mounted on a circuit board disposed in the motor actuator 5.
The electric circuit diagram of the potentiometer 9 is shown in FIG. 2 wherein I1 representates the current flowing across the auxiliary resistance 15, I2 the current flowing between an upper end of the resistance element 9b and the tap 14, I3 the current flowing between the tap 14 and a lower end of the resistance element 9b, r the resistance per unit length of the resistance element, L0 the distance between the lower end of the resistance element 9b and the tap 14, x the distance between the lower end of the resistance element 9b and the movable contact 9a. With this arrangement, when x≦L0 the output voltage Vx of the potentiometer 9 is given by the following equation:
V.sub.x =r×I.sub.3                                   (1)
On the other hand, when x≧L0, the output voltage Vx of the potentiometer 9 is given by the following equation:
V.sub.x =rL.sub.0 I.sub.3 +r(x-L.sub.0)I.sub.2
Accordingly,
V.sub.x =r×I.sub.2 +rL.sub.0 (I.sub.3 -I.sub.2)I.sub.3 -I.sub.2 =I.sub.1
Therefore,
V.sub.x ×r×I.sub.2 +rL.sub.0 I.sub.1           (2)
From the foregoing equations, it appears that when x=L0, the output voltage in both equations is given by Vx =rL0 I3, and I3 >I2. Accordingly, by properly setting the currents I, and I2 which vary with the position of the tap 14 and the resistance value of the auxiliary resistance 14, the relation between the output voltage Vx of the potentiometer 9 and the opening amount θ of the air-mix door 3 corresponding to the position of the movable contact 9a is given by a performance curve consisting of two linear lines joined at the turning point corresponding to the opening amount θ1 of the air-mix door 3. Thus, a sharp change in the blown-off air temperature occurring when the air-mix door 3 has the opening amount θ1 is compensated by the potentiometer 9 which in turn delivers an output signal to the control circuit 7. Such compensation ensures that the blown-off air temperature t varies along the desired performance line indicated by the phantom lines in FIG. 5. The blown-off air temperature t changes an even rate of variation over the entire range of movement of the air-mix door 3 so that a stable temperature change of blown-off air and improves feelings of occupants of the vehicle passenger compartment are provided.
Although in the illustrated embodiment, the auxiliary resistance 15 is connected to the tap 14 fixed to the resistance element 9b at the power source side of the latter, two such taps and auxiliary resistance may be employed in which instance the other end of each auxiliary resistance is grounded. Other modifications are possible to satisfy the desired performance of the potentiometer.
Obviously, many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.

Claims (2)

What is claimed is:
1. An automobile air conditioner system including an air-mix door for adjusting the temperature of air blown-off from the air conditioner system, and a temperature control device having a potentiometer including a movable contact movable in unison with said air-mix door and a resistance element along which said movable contact slides for detecting the opening amount of said air-mix door, said temperature control device comprising at least one tap disposed between opposite ends of said resistance element, and an auxiliary resistance connected at its one end with said tap and disposed parallel to said resistance element.
2. An automobile air conditioner system according to claim 1, said temperature control device further including a power source, one end of said resistance element and the other end of said auxiliary resistance being connected with an anode of said power source.
US06/798,027 1984-08-24 1985-11-14 Automobile air conditioner system with improved temperature control device Expired - Fee Related US4611755A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59175269A JPH0648322B2 (en) 1983-08-26 1984-08-24 Coated optical fiber
JP59-175269 1984-11-19

Publications (1)

Publication Number Publication Date
US4611755A true US4611755A (en) 1986-09-16

Family

ID=15993194

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/798,027 Expired - Fee Related US4611755A (en) 1984-08-24 1985-11-14 Automobile air conditioner system with improved temperature control device

Country Status (1)

Country Link
US (1) US4611755A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698980A (en) * 1985-12-16 1987-10-13 Diesel Kiki K.K. Apparatus for controlling vehicle air conditioner
US4840308A (en) * 1987-07-18 1989-06-20 Sanden Corporation Automotive air conditioning system damper position control
EP0425955A2 (en) * 1989-10-26 1991-05-08 Hella KG Hueck & Co. Method and apparatus for regulating the internal temperature of a motor vehicle
US5342027A (en) * 1992-07-24 1994-08-30 Sanden Corporation Damper position control device for automotive air conditioning system
US5816066A (en) * 1996-07-03 1998-10-06 Sanden Corporation Air conditioner with heating, cooling and reheat
US20150158365A1 (en) * 2012-02-06 2015-06-11 Denso Corporation Vehicular air conditioner
US9291191B1 (en) 2011-07-15 2016-03-22 Classic Autoair Manufacturing Lp Automotive air conditioning system
US9927149B2 (en) 2014-08-28 2018-03-27 Rodluvan Inc. Method for using concentrated solar power

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155984A (en) * 1935-10-31 1939-04-25 Honeywell Regulator Co Temperature control system
US2511846A (en) * 1950-06-20 Halpert
US2844776A (en) * 1955-11-15 1958-07-22 Dimeff John Servomotor capacitance-coupled potentiometer wiper circuit
US3320503A (en) * 1955-05-11 1967-05-16 Allen H Schooley Radial resistive polar coordinate date takeoff transmitter for a servo control
US3419775A (en) * 1965-05-12 1968-12-31 Westinghouse Electric Corp On-off and proportional position servo motor control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511846A (en) * 1950-06-20 Halpert
US2155984A (en) * 1935-10-31 1939-04-25 Honeywell Regulator Co Temperature control system
US3320503A (en) * 1955-05-11 1967-05-16 Allen H Schooley Radial resistive polar coordinate date takeoff transmitter for a servo control
US2844776A (en) * 1955-11-15 1958-07-22 Dimeff John Servomotor capacitance-coupled potentiometer wiper circuit
US3419775A (en) * 1965-05-12 1968-12-31 Westinghouse Electric Corp On-off and proportional position servo motor control system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698980A (en) * 1985-12-16 1987-10-13 Diesel Kiki K.K. Apparatus for controlling vehicle air conditioner
US4840308A (en) * 1987-07-18 1989-06-20 Sanden Corporation Automotive air conditioning system damper position control
EP0425955A2 (en) * 1989-10-26 1991-05-08 Hella KG Hueck & Co. Method and apparatus for regulating the internal temperature of a motor vehicle
US5050795A (en) * 1989-10-26 1991-09-24 Hella Kg Hueck & Co. Process and apparatus for regulating an interior temperature of a motor vehicle
EP0425955A3 (en) * 1989-10-26 1992-08-12 Hella Kg Hueck & Co. Method and apparatus for regulating the internal temperature of a motor vehicle
US5342027A (en) * 1992-07-24 1994-08-30 Sanden Corporation Damper position control device for automotive air conditioning system
US5816066A (en) * 1996-07-03 1998-10-06 Sanden Corporation Air conditioner with heating, cooling and reheat
US9291191B1 (en) 2011-07-15 2016-03-22 Classic Autoair Manufacturing Lp Automotive air conditioning system
US20150158365A1 (en) * 2012-02-06 2015-06-11 Denso Corporation Vehicular air conditioner
US9927149B2 (en) 2014-08-28 2018-03-27 Rodluvan Inc. Method for using concentrated solar power

Similar Documents

Publication Publication Date Title
US4482009A (en) Automobile air conditioning system
US4448034A (en) Air-conditioning system for an automotive vehicle
US4434932A (en) Air-conditioner control system for automobiles
US4665971A (en) Air conditioner system for automobiles
US5156204A (en) Air conditioner system with defrost door modulation as a function of ambient temperature
EP0039846B1 (en) Air-conditioning control apparatus for automotive vehicles
US4856710A (en) Dual air conditioner for a vehicle
US4611755A (en) Automobile air conditioner system with improved temperature control device
US4375754A (en) Vehicle temperature control apparatus
US4829884A (en) Blowout temperature control system
EP0170177A1 (en) Heating and/or air conditioning system for the interior space of a motor vehicle
US4356705A (en) Vehicle temperature control apparatus
US4488411A (en) Idle speed control apparatus
US4640183A (en) Air conditioner
EP0287393A2 (en) Control device for automotive air conditioning system
US5642856A (en) Air conditioner
US5957375A (en) Sunload sensor for automatic climate control systems
US5086830A (en) Air-conditioning system for motor vehicles
US4930698A (en) Control apparatus for automobile air-conditioners
US4922171A (en) Motor actuator with air-mix door opening-limiter and built-in switching unit
US5626186A (en) Air conditioning apparatus for vehicles
US4961462A (en) Control apparatus for automobile air-conditioners
US4766950A (en) Controller for an air conditioner of vehicles
JP3644101B2 (en) Air conditioner
US4660461A (en) Air conditioner

Legal Events

Date Code Title Description
AS Assignment

Owner name: DIESEL KIKI CO., LTD., 6-7, SHIBUYA 3-CHOME, SHIBU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:MIYANAGA, CHOSHICHI;SAKURAI, YOSHIHIKO;IIDA, KATSUMI;AND OTHERS;REEL/FRAME:004483/0480

Effective date: 19851101

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: ZEZEL CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:DIESEL KOKI CO., LTD.;REEL/FRAME:005691/0763

Effective date: 19900911

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19940921

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362